Ex-assistant tells court how Bill Cosby 'forced her to swallow a white pill, she lost consciousness and then found herself on his bed, her dress pulled up, her breasts exposed - and the comedian lying behind her making grunting sounds'

Kelly Johnson (above left), the first witness for the prosecution in the criminal trial against Bill Cosby for sexual assault against Andrea Constand, broke down and wept as she recalled an alleged assault by Cosby at the Bel Air hotel in 1996. Cosby had arrived at Montgomery County Court in Norristown, Pennsylvania Monday morning for the first day of his trial. The 79-year-old is accused of drugging and raping Andrea Constand (center) in 2004. The disgraced actor was walked in by his lawyer and his former TV daughter Keshia Knight Pulliam who played Rudy Huxtable on the Cosby Show. Cosby, who was once deemed 'America's favorite TV dad, gave no impression of a man under pressure and was seen laughing and chatting with his legal team.